diff --git a/src/main/java/com/jjoe64/graphview/GridLabelRenderer.java b/src/main/java/com/jjoe64/graphview/GridLabelRenderer.java
index 9b4bd4fa2..09ae9c2b3 100644
--- a/src/main/java/com/jjoe64/graphview/GridLabelRenderer.java
+++ b/src/main/java/com/jjoe64/graphview/GridLabelRenderer.java
@@ -725,7 +725,7 @@ protected boolean adjustVertical(boolean changeBounds) {
         }
 
         double minY = mGraphView.getViewport().getMinY(false);
-        double maxY = mGraphView.getViewport().getMaxY(false);
+        double maxY = mGraphView.getViewport().getMaxY(true);
 
         if (minY == maxY) {
             return false;